Patents by Inventor Philippe W. M. Rutten

Philippe W. M. Rutten has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Production of high purity meta-xylene
    Patent number: 6376736
    Abstract: A continuous process for integrated processing of a C8+ aromatic hydrocarbon stream is disclosed for recovery of a high purity meta-xylene product in conjunction with efficient separation and recovery of purified para-xylene and, optionally, purified ortho-xylene products.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: April 23, 2002
    Assignee: Washington Group International, Inc.
    Inventors: Philippe W. M. Rutten, James S. Law, Douglas S. Hubbell
  • Crystallization process for purification of paraxylene
    Patent number: 5811629
    Abstract: Improved process and apparatus for purifying paraxylene from mixed C8-aromatic feedstocks are disclosed in which the use of at least two crystallization stages operated at different temperatures in combination with a final product separator improves purity and recovery while reducing capital and energy costs.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: September 22, 1998
    Assignee: Raytheon Engineers & Constructors, Inc.
    Inventors: Douglas S. Hubbell, Philippe W. M. Rutten